Ja'far bin Muhammad (may Allah have mercy on him) narrates from his father that the Messenger of Allah (peace and blessings be upon him) said: "Do good to both those who deserve it and those who do not deserve it. If you do good to a deserving person, you have reached what is right, and if you do good to an undeserving person, then you yourself are worthy of doing good."
Hadith Referenceالسنن المأثورة / باب ما جاء في صدقة الفطر / 378
Hadith Takhrijالسلسلۃ الضعیفۃ للالبانی رقم : 2521 ، ضعیف الجامع ، رقم : 1052